201 Steve, I think it was you that responded to my wife’s Garmin FB post. We are having they exact same issues. I sent a PM so we could compare notes.
We replaced both units due to the recall. 2 months later the HSI quit working. Replaced that under warranty. Now one unit will trickle down the battery when bot in use. Sometime it charges in flight, however yesterday it did not. We had battery replaced and still the same issue.
We are about to start moving batteries and then units to try and see if problem follows the battery or the unit.
Right now it seems like Garmin is on to bigger and better units and are giving the G5’s the finger